<template>
  <div class="my-tab-bar">
    <div class="tab-item" v-for="(item, index) in list" :key="index"
     :class="{current: index === ind}"
     @click="btn(index,item.componentName)"
    >
      <!-- 图标 -->
      <span class="iconfont" :class="item.iconText"></span>
      <!-- 文字 -->
      <span>{{ item.text }}</span>
    </div>
  </div>
</template>

<script>
// 1 高亮事件
// 2 动态切换组件
export default {
  props: {
    list: {
      type: Array,
      required: true,
      // 自定义校正规则
      validator(val) {
        //  console.log(val);
        if (val.length < 2 || val.length > 5) {
          return false;
        } else {
          return true;
        }
      },
    },
  },
  data () {
    return {
      ind :0 // 默认第一个高亮
    }
  },
  methods: {
    btn(index,componentName){
      this.ind = index // 点击把当前的索引给ind变量
      this.$emit('changeName',componentName) // 把名字传递过去，用于动态切换
    }
  },
};
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}

.current {
  color: #1d7bff;
}
</style>
